EP0273894B1 - Resealable flexible packaging and sealing tape therefore - Google Patents

Resealable flexible packaging and sealing tape therefore Download PDF

Info

Publication number
EP0273894B1
EP0273894B1 EP87870188A EP87870188A EP0273894B1 EP 0273894 B1 EP0273894 B1 EP 0273894B1 EP 87870188 A EP87870188 A EP 87870188A EP 87870188 A EP87870188 A EP 87870188A EP 0273894 B1 EP0273894 B1 EP 0273894B1
Authority
EP
European Patent Office
Prior art keywords
bag
tape
section
flexible packaging
resealable flexible
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87870188A
Other languages
German (de)
French (fr)
Other versions
EP0273894A3 (en
EP0273894A2 (en
Inventor
Ron Linnewiel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT87870188T priority Critical patent/ATE74094T1/en
Publication of EP0273894A2 publication Critical patent/EP0273894A2/en
Publication of EP0273894A3 publication Critical patent/EP0273894A3/en
Application granted granted Critical
Publication of EP0273894B1 publication Critical patent/EP0273894B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/1691—End- or aperture-closing arrangements or devices using adhesive applied to attached closure elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/14—Layer or component removable to expose adhesive
    • Y10T428/1481—Dissimilar adhesives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2839—Web or sheet containing structurally defined element or component and having an adhesive outermost layer with release or antistick coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2848—Three or more layers

Definitions

  • the present invention concerns flexible packaging, made from one layer film or from laminate, in particular the kind of packaging used for marketing food stuffs in bulky or granular form, and a sealing tape thereof.
  • Most flexible packaging is usually made up of a laminated plastic film constituted by two or more laminations, the plastics for the outside laminate being chosen with a view to preserve the contents of the bag, and to carry the printed text.
  • the inside film is chosen with a view to give a good sealibility.
  • the film for the bag is chosen to be more or less flexible depending on the product to be packaged.
  • the bag is sealed at least along one longitudinal sean and at two-cross seans. In order to open the sealed package, one of the seans generally is torn or cut (see for instance US.A. 4584201).
  • the bags will bulge considerably. If the products are granular, i.e. ground coffee or must and the like, they will be distributed in the bag wich will then be more or less flat. In either case, the package must be reclosable, since all the contents are generally not removed at one time, i.e. when the bag is first opened. The reclosing of the bag and sealing it, in this condition to prevent damage to the contents, presents a great problem and many attepmts have been made to find a suitable solution.
  • an adhesive tape is attached across the width of the entire bag, and when the later has been partly emptied, the open end is folded over once or twice onto itself, the tape is removed and is reapplied partly across the end of the fold and partly across the bag.
  • an adhesive tape is provided across an opening in the bag.
  • This opening may be an unsealed sean, a slit, or perforations which are to be torn to provide said opening.
  • the tape is partially lifted and some of the contents are removed through said opening. Thereafter, the bag is held at the two ends of the opening and said ends are pulled away form each other to close the opening. The removed part of the tape is then pressed back to its former position.
  • a further consideration in making resealable flexible packaging is the attachment of the sealing means during or after the production of the bag itself which is effected with a minimum increase of costs.
  • the invention consists of resealable flexible packaging comprising the conventional bag and a relatively short plastic tape, one section of which is provided with a permanent high tack adhesive on one surface and is attached to the bag at a suitable distance from the end destined to be opened the another section being provided with a low tack adhesive folded onto itself with the interposition of a layer of silicone, the free end of said second section facing said end of the bag to be opened and being adhesive free to serve as a finger lift.
  • high-tack and low-tack adhesives are well known in the industry and do not require detailed explanation, the high-tack adhesive adhering permanently to a surface, while the low-tack adhesive adheres well, but can be removed and reattached a great number of times.
  • said suitable distance is equal to at least the space required for folding over twice the end of the bag.
  • the tape is made of a thin film of plastic material, e.g. polypropylene, polyvinyl chloride or the like. It is preferably of a width of between 10% - 30% of the width of the package, the actual width depending on the flexibility of the bag after it has been filled, i.e. granular contents require a narrower tape to hold the folded-over end of the bag, while bulky contents require a wider tape.
  • plastic material e.g. polypropylene, polyvinyl chloride or the like.
  • the bag In use, the bag is opened and as much of the contents as necessary is removed. Thereafter, the open end of the bag, which now lies flat, is folded over at least twice, a process which seals the bag substantially hermatically.
  • the tape is then grasped by the fingerlift and is pulled, which causes the said low-tack adhesive section to unfold and to become one straight piece, so that it can be applied to the folded-over part of the bag to which it will adhere tightly.
  • the finger lift is grasped and the low-tack section of the tape is peeled off from the folded part of the bag and is again folded onto itself.
  • the tape will not become dirty and thus loose its ability to stick.
  • the reasealing process can be repeated as many times as required, without impairing the tape, the bag or its contents.
  • the tape can easily be attached, by conventional means, well known in the industry, to a prefabricated bag or in coordination with the actual manufacturing and/or filling machinery of the bag itself.
  • the tape will, according to the invention, project beyond the surface of the bag, it will not interfere with the handling of either an empty or a full bag, since it is very thin and flexible, and applies itself against the flat or the bulging surface or a filled bag, since, when not in use, the tape is folded onto itself, it will not adhere to any other surface such as an adjacent bag. At no time, either during filling or emptying the bag, will the tape be in contact with the packaged product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Sealing Material Composition (AREA)
  • Adhesive Tapes (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Packages (AREA)
  • Cartons (AREA)

Abstract

A sealing tape for resealable flexible packaging comprising a plastic tape, one section of which is provided with a permanent high-tack adhesive, the second section being provided with a low-tack adhesive and being folded onto itself with the interposition of a layer of silicone, the face end of said second section being adhesive free and resealable flexible packaging comprising a conventional bag and a sealing tape, wherein the section with high-tack adhesive is attached to the bag at a suitable distance from the end to be opened, said end of said second section facing said end of the bag to be opened and serving as a finger lift.

Description

  • The present invention concerns flexible packaging, made from one layer film or from laminate, in particular the kind of packaging used for marketing food stuffs in bulky or granular form, and a sealing tape thereof.
  • Most flexible packaging is usually made up of a laminated plastic film constituted by two or more laminations, the plastics for the outside laminate being chosen with a view to preserve the contents of the bag, and to carry the printed text. The inside film is chosen with a view to give a good sealibility. The film for the bag is chosen to be more or less flexible depending on the product to be packaged. The bag is sealed at least along one longitudinal sean and at two-cross seans. In order to open the sealed package, one of the seans generally is torn or cut (see for instance US.A. 4584201).
  • If the products packaged in these bags are bulky, e.g. cheese, olives or like, the bags will bulge considerably. If the products are granular, i.e. ground coffee or must and the like, they will be distributed in the bag wich will then be more or less flat. In either case, the package must be reclosable, since all the contents are generally not removed at one time, i.e. when the bag is first opened. The reclosing of the bag and sealing it, in this condition to prevent damage to the contents, presents a great problem and many attepmts have been made to find a suitable solution.
  • In one type of reclosable flexible packaging an adhesive tape is attached across the width of the entire bag, and when the later has been partly emptied, the open end is folded over once or twice onto itself, the tape is removed and is reapplied partly across the end of the fold and partly across the bag.
  • The main drawback of this solution is the fact that the packaged bag is bulky and is thus distorted by its contents, the tape, which is less flexible than the film of the bag loosens automatically, its ends lifting away from the surface of the bag. This presents a problem in the handling of an unopened bag, since these ends will become attached to adjacent packaged bags. If the bag has been opened and resealed, the seal will become loose. In either case, the tape may become detached altogether. Another disadvantage of this solution is the fact that the tape will not seal properly when applied to a full bag and this will effect the shelf life of the product, and also dust can adhere to such tape, preventing it from performing its function.
  • In another type of reclosable flexible packaging, an adhesive tape is provided across an opening in the bag. This opening may be an unsealed sean, a slit, or perforations which are to be torn to provide said opening. When the bag is to be opened, the tape is partially lifted and some of the contents are removed through said opening. Thereafter, the bag is held at the two ends of the opening and said ends are pulled away form each other to close the opening. The removed part of the tape is then pressed back to its former position.
  • The main drawback of this type of resealing is as in the above mentioned type the fact that the tape when applied to a full bag will not seal properly and therefore will adversely affect the shelf life of the product. Furthermore, if the contents of the bag are granular, they will adhere to the tape so that it can no longer perform its function.
  • A further consideration in making resealable flexible packaging is the attachment of the sealing means during or after the production of the bag itself which is effected with a minimum increase of costs.
  • It is the object of the present invention to provide resealable flexible packaging which overcomes the above mentioned disadvantages and problems in the manufacture, handling, as well as use of the bags known up to now. This object is attained by a sealing tape and a packaging according to to claims 1 and 2 respectively.
  • The invention consists of resealable flexible packaging comprising the conventional bag and a relatively short plastic tape, one section of which is provided with a permanent high tack adhesive on one surface and is attached to the bag at a suitable distance from the end destined to be opened the another section being provided with a low tack adhesive folded onto itself with the interposition of a layer of silicone, the free end of said second section facing said end of the bag to be opened and being adhesive free to serve as a finger lift.
  • The terms high-tack and low-tack adhesives are well known in the industry and do not require detailed explanation, the high-tack adhesive adhering permanently to a surface, while the low-tack adhesive adheres well, but can be removed and reattached a great number of times.
  • In a preferred embodiment of the invention, said suitable distance is equal to at least the space required for folding over twice the end of the bag.
  • The tape is made of a thin film of plastic material, e.g. polypropylene, polyvinyl chloride or the like. It is preferably of a width of between 10% - 30% of the width of the package, the actual width depending on the flexibility of the bag after it has been filled, i.e. granular contents require a narrower tape to hold the folded-over end of the bag, while bulky contents require a wider tape.
  • In use, the bag is opened and as much of the contents as necessary is removed. Thereafter, the open end of the bag, which now lies flat, is folded over at least twice, a process which seals the bag substantially hermatically. The tape is then grasped by the fingerlift and is pulled, which causes the said low-tack adhesive section to unfold and to become one straight piece, so that it can be applied to the folded-over part of the bag to which it will adhere tightly.
  • When the bag is to be reopened, the finger lift is grasped and the low-tack section of the tape is peeled off from the folded part of the bag and is again folded onto itself. Thus, while the contents of the bag are removed, the tape will not become dirty and thus loose its ability to stick. The reasealing process can be repeated as many times as required, without impairing the tape, the bag or its contents.
  • The tape can easily be attached, by conventional means, well known in the industry, to a prefabricated bag or in coordination with the actual manufacturing and/or filling machinery of the bag itself. Although the tape will, according to the invention, project beyond the surface of the bag, it will not interfere with the handling of either an empty or a full bag, since it is very thin and flexible, and applies itself against the flat or the bulging surface or a filled bag, since, when not in use, the tape is folded onto itself, it will not adhere to any other surface such as an adjacent bag. At no time, either during filling or emptying the bag, will the tape be in contact with the packaged product.

Claims (4)

  1. A sealing tape for resealable flexible packaging comprising a plastic tape, one section of which is provided on one surface with a permanent high-tack adhesive, the second section being provided on the same one surface with a low-tack adhesive and being folded onto itself with the interposition of a layer of silicone, the free end of said second section being adhesive free.
  2. Resealable flexible packaging comprising a conventional bag and a tape as claimed in claim 1, wherein the section with high-tack adhesive is attached to the bag at a suitable distance from the end to be opened, said free end of said second section facing said end of the bag to be opened and serving as a finger lift.
  3. Resealable flexible packaging as claimed in claim 2, wherein said suitable distance is equal to at least the space required for folding over twice the end of the bag.
  4. Resealable flexible packaging as claimed in claim 2 or 3 wherein the width of the tape is preferably 10% - 30% of the width of the bag.
EP87870188A 1986-12-30 1987-12-18 Resealable flexible packaging and sealing tape therefore Expired - Lifetime EP0273894B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87870188T ATE74094T1 (en) 1986-12-30 1987-12-18 SEALABLE FLEXIBLE PACKAGING AND SEALING STRIP FOR IT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL81120 1986-12-30
IL8112086A IL81120A (en) 1986-12-30 1986-12-30 Resealable flexible packaging and sealing tape therefor

Publications (3)

Publication Number Publication Date
EP0273894A2 EP0273894A2 (en) 1988-07-06
EP0273894A3 EP0273894A3 (en) 1989-07-05
EP0273894B1 true EP0273894B1 (en) 1992-03-25

Family

ID=11057403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87870188A Expired - Lifetime EP0273894B1 (en) 1986-12-30 1987-12-18 Resealable flexible packaging and sealing tape therefore

Country Status (12)

Country Link
US (1) US4902141A (en)
EP (1) EP0273894B1 (en)
JP (1) JPS63221183A (en)
KR (1) KR880007327A (en)
AT (1) ATE74094T1 (en)
AU (1) AU614271B2 (en)
BR (1) BR8707114A (en)
CA (1) CA1299931C (en)
DE (1) DE3777787D1 (en)
ES (1) ES2031533T3 (en)
IL (1) IL81120A (en)
ZA (1) ZA879381B (en)

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US9499309B2 (en) * 2011-07-28 2016-11-22 Intercontinental Great Brands Llc Reclosable packaging using a low-tack adhesive fastener
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CN105377714B (en) * 2013-07-03 2019-01-01 诺赛尔股份有限公司 Improve the method reclosed for having the foldable oxidizing hair coloring agents bag for reclosing device
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JP6937619B2 (en) * 2017-06-20 2021-09-22 藤森工業株式会社 Packaging bag
JP6937620B2 (en) * 2017-06-20 2021-09-22 藤森工業株式会社 Packaging bag
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Also Published As

Publication number Publication date
AU614271B2 (en) 1991-08-29
KR880007327A (en) 1988-08-26
JPH0210192B2 (en) 1990-03-07
JPS63221183A (en) 1988-09-14
ES2031533T3 (en) 1992-12-16
US4902141A (en) 1990-02-20
IL81120A (en) 1994-10-07
EP0273894A3 (en) 1989-07-05
IL81120A0 (en) 1987-03-31
BR8707114A (en) 1988-08-02
AU8245587A (en) 1988-07-07
ZA879381B (en) 1988-06-09
DE3777787D1 (en) 1992-04-30
EP0273894A2 (en) 1988-07-06
ATE74094T1 (en) 1992-04-15
CA1299931C (en) 1992-05-05

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